Use Of Personal Permanent Hair Dye Is Not Linked To Bladder Cancer Risk

... UroToday.com - An occupational exposure to hair dyes by hairdressers and barbers is shown to increase their bladder cancer risk. Hair dyes contain small amounts of aromatic amines, which are shown to be carcinogenic in animals. Prior to 1980, the formulations contained much higher contents of carcinogens. [click link for full article] ...